Reasons For

The Acer K272HL has a screen size of 27", but the Lenovo E2323 is only a 23" PC monitor (4" smaller).
Read more

The display diagonal is a measure of the size of the monitor. It is measured from one corner of the screen to the diagonally opposite corner of the screen.

A bigger display diagonal means that the screen will be larger and better for displaying lots of content or for seeing the detail in photos and videos.

Brighter display brightness
Edit

The Acer K272HL has a display brightness of 300 cd/m², but the Lenovo E2323 is only a 250 cd/m² display brightness PC monitor (50 cd/m² dimmer).

2x faster response time
Edit

The Acer K272HL is a 2ms response time PC monitor. That's 3ms faster than the Lenovo E2323 (5ms).
Read more

The response time on a PC monitor is a measure of how quickly the monitor reacts to image data sent by the computer's graphics card. Fast response times are particularly important for gamers, who should ideally look for a response time of 8 milliseconds or less.

A faster (shorter) response time is better because fast moving graphics will appear smoother and the gaming experience will feel more responsive.

The Lenovo E2323 has a response time of 5ms, however the Acer K272HL is a 2ms response time PC monitor (3ms faster).
Read more

The response time on a PC monitor is a measure of how quickly the monitor reacts to image data sent by the computer's graphics card. Fast response times are particularly important for gamers, who should ideally look for a response time of 8 milliseconds or less.

A faster (shorter) response time is better because fast moving graphics will appear smoother and the gaming experience will feel more responsive.